Engine control device

An engine control device configured to control an engine, the engine control device comprising:

• a processor;
• and
• a memory coupled to the processor and storing instructions,
• wherein the engine comprises:
• a turbocharger comprising a turbine configured to be driven by an exhaust gas and a compressor configured to be driven by the turbine;
• a waste gate valve that is provided in a passage that allows the exhaust gas to bypass a section from an inlet side to an outlet side of the turbine;
• and
• a throttle configured to adjust an intake air amount, and
• wherein the processor executes the instructions, such that:
• in a predetermined low load region, the engine control device is configured to perform a first control in which the waste gate valve is opened at a predetermined opening degree or more and output adjustment is performed by an opening degree of the throttle;
• in a predetermined high load region, the engine control device is configured to perform a second control in which the throttle is opened at a predetermined opening degree or more and output adjustment is performed by an opening degree of the waste gate valve;
• and
• when a torque limiting request is generated in the high load region, the engine control device is configured to perform a third control in which the waste gate valve is substantially fully closed and output adjustment is performed by the opening degree of the throttle based on a ratio of a limited torque, which is set when the torque limiting request is generated, to a requested torque, which is set on a basis of a driving state of a vehicle.